JP6868666B2 - Injectors, lancet assemblies and puncture devices - Google Patents

Description

The present invention relates to a puncture device used for puncturing a predetermined part of the body with a sharp member (for example, a needle) for the purpose of collecting body fluid such as blood. In particular, the present invention also relates to a lancet assembly (an assembly consisting of a lancet and a lancet holder accommodating the lancet) which is a component of such a puncture device, and an injector used in combination with such a lancet assembly.

Blood must be collected to measure blood glucose levels in diabetics. Various puncture devices have been used to collect very small amounts of blood. Such devices generally consist of a lancet (eg, Patent Document 1) and an injector. The lancet is a member used for actual puncture, while the injector has a function of firing the lancet toward a predetermined position.

Specifically, the lancet is provided with a "puncture needle", while the injector is provided with a "plunger equipped with a lancet mounting portion and a spring". The spring of the plunger is used in the compressed state, and by releasing the compressed state, the plunger moves instantly. In use, after attaching the lancet to the injector plunger, the trigger releases the compressed state of the plunger spring. As a result, the plunger with a lancet is fired in the puncture direction, and the puncture is performed at a predetermined position.

U.S. Patent Specification No. 5385571

The applicant has invented the puncture device described below and has filed an application for the invention (International Patent Publication No. 2007/08215, filing date: August 8, 2006). , Invention name: "Puncture device and its constituent lancet assembly and injector assembly"). The lancet assembly and the injector assembly according to the present invention will be briefly described with reference to the drawings (hereinafter, the “injector assembly” will also be referred to as an “injector”). FIG. 47 shows the appearance of the lancet assembly 100', and FIG. 48 shows the appearance of the injector 200'. As shown in FIG. 47, the lancet assembly 100'consists of the lancet 101'and the protective cover 102'. As shown in FIGS. 49 and 50, the lancet 101'contains a lancet body 104', a lancet cap 106' and a puncture needle 105'. The metal puncture needle 105'is located across the resin lancet body 104' and the lancet cap 106'. The tip of the puncture needle 105'is covered by the lancet cap 106', and the lancet cap 106' and the lancet body 104' are integrally connected via the weakening member 108'. As shown in FIGS. 47 and 50, the protective cover 102'is provided so as to surround a part of the lancet body 104'. The lancet cap 106'is removed after the lancet assembly 100'is loaded into the injector 200'. As a result, the tip of the puncture needle 105'is exposed, so that the lancet can be used for puncture.

The injector 200'shown in FIG. 48 is a device that can be used in combination with the lancet assembly 100'to launch a "lancet body with the tip of the puncture needle 105'exposed". The injector 200'has a "plunger 204' that can engage the rear end of the lancet body and launch the lancet body in the puncture direction" (see FIG. 51). When loading the injector 200', as shown in FIG. 51, the lancet assembly 100'is inserted through the front end opening 214' of the injector 200'. After some insertion, as shown in FIG. 52, the rear portion 116'of the lancet assembly 100'is gripped by the tips 264', 266' of the plunger 204'. If the insertion is continued continuously, the plunger 204'retracts and the firing energy is accumulated. That is, when the plunger 204'is retracted, the spring (not shown) provided in the plunger 204'compresses (thus, when the compressed state is released, the plunger instantly moves forward and the lancet moves. Will be fired). FIG. 53 shows an injector 200'with the plunger retracted and the firing energy stored.

When the loading of the lancet assembly 100'to the injector 200' is completed, the lancet cap 106'is removed to expose the tip of the puncture needle 105'. The details of the removal of the lancet cap 106'are as follows. As shown in FIGS. 49 and 50, the lancet body 104'and the lancet cap 106' are integrally coupled by a weakened portion 108'located between them. The weakening member 108'can be destroyed by turning the lancet body 104'and the lancet cap 106' in relatively opposite directions around the puncture needle (FIG. 53 shows a mode of turning in the G direction). ), Thereby the lancet cap 106'can be removed. That is, the tip of the puncture needle 105'is exposed by so-called "twist-off".

At the time of puncture, the front end opening 214'of the injector 200' is applied to a predetermined portion (for example, a fingertip) to be punctured, and then the press portion 542'of the trigger member 514' is pushed (see FIG. 54). By pushing the press portion 542', the plunger 204'is fired forward (that is, the compressed spring is released), and the puncture needle performs puncture.

Here, the inventors of the present application have found that the injector is an important one having a function of firing a lancet, and there are still the following matters to be improved.

● There is a need to change the puncture depth of the puncture needle depending on the puncture location, but puncture devices, especially injectors, are rarely provided with a mechanism for adjusting such puncture depth. Further, even if such a mechanism is provided, the depth adjustment dial provided on the injector is not always easy to handle. Specifically, when the user turns the depth adjustment dial with his / her fingertip, there is little change due to the adjustment (for example, "click" indicating that the adjustment was made when the adjustment dial was rotated / the scale value changed. It was difficult for the user to sensuously and clearly determine whether or not the adjustment was performed (whether or not the scale value was changed appropriately).

● When loading the lancet assembly into the injector, it is desirable to hold the lancet assembly appropriately with respect to the injector, but the specifications of the injector were not always suitable for that purpose. Moreover, even if such specifications are taken into consideration, it cannot be said that they exhibit sufficient functions in many cases. Specifically, it is conceivable to hold and fix the holder of the lancet assembly with an engaging protrusion provided on the injector, but the injector itself is made of resin, and therefore the engaging protrusion is also made of resin. Therefore, the engaging protrusions are worn out during repeated use, and the holding force is reduced.

In addition, the inventors of the present application have found that the lancet assembly itself still has the following items to be improved.

● The lancet that composes the lancet assembly is used after the cap that covers the needle tip is finally removed, but there is a risk that the needle tip will bend when the cap is removed. Specifically, a load is applied to the needle tip due to the "gripping operation" performed to remove the cap, and as a result, the needle tip may be bent or broken. In particular, recently, there is a tendency to use an ultra-fine puncture needle, and such an ultra-fine puncture needle is particularly liable to bend. Bending the needle tip increases the pain felt by the blood sampler during puncture.

The present invention has been made in view of the above circumstances. That is, an object of the present invention is to provide a puncture device composed of a more suitable injector and lancet assembly.

In order to solve the above problems, in the present invention,
It is an injector that fires the lancet of the lancet assembly and uses it for puncture, and has a plunger that fires the lancet in the puncture direction and an injector casing that contains the plunger.
The puncture depth adjustment mechanism of the injector
A protrusion that protrudes outward from the plunger in its transverse direction,
It is composed of a cylindrical member having an uneven portion and a step portion, and a spring member provided side by side with the cylindrical member along the axial direction of the injector.
While the concave-convex portion is provided on the cylindrical member so that the normal of the surface forming the concave-convex portion is substantially parallel to the axial direction of the injector, the complementary shape portion having a shape complementary to a part of the uneven portion is the injector. It is provided on the casing, and the contact between a part of the uneven portion of the cylindrical member and the complementary shape portion of the injector casing is maintained by the pressing force applied from the spring member.
When the plunger moves forward during puncture, the protrusion of the plunger collides with the step portion of the cylindrical member so that the plunger cannot move further forward and the puncture depth. By rotating the cylindrical member about its axis, the step portion where the protrusion of the plunger will collide can be changed to a step portion of a different height, whereby the front of the plunger can be adjusted. An injector is provided that changes the distance traveled.

One of the features of the injector according to the present invention is that the puncture depth adjusting mechanism has a "cylindrical member having an uneven portion and a step portion". In particular, while the concave-convex portion is provided on the cylindrical member so that the normal of the surface (that is, the concave-convex surface) forming the concave-convex portion of the cylindrical member is substantially parallel to the axial direction of the injector, it complements a part of the uneven portion. A complementary shape portion having a specific shape is provided on the injector casing, and a contact between a part of the uneven portion of the cylindrical member and the complementary shape portion of the injector casing is maintained by the pressing force applied from the spring member. .. As a result, the user is provided with a “click feeling” suitable for adjusting the puncture depth by turning the cylindrical member with the fingertip.

In a preferred embodiment of the injector according to the present invention, the uneven portion is provided in the end region of the outer peripheral surface of the cylindrical member, and the complementary shape portion is provided on the inner wall surface of the injector casing. In another preferred embodiment, the plunger is provided so that the step portion is provided on the inner peripheral surface of the cylindrical member and the protrusion of the plunger is located inside the cylindrical member and behind the step portion. Penetrates.

It is preferable that the uneven portion of the cylindrical member has a form that is periodically continuous along the circumferential direction of the cylindrical member. When the cylindrical member is rotated to adjust the puncture depth, a part of the uneven portion of the cylindrical member that abuts on the complementary shape portion of the injector casing is changed to another part. When a part of the uneven portion of the cylindrical member that abuts on the complementary shape portion of the injector casing changes to another part in this way, it is preferable that the spring member temporarily contracts. That is, it is preferable that the spring member once contracts and then returns to its original form. The spring member may be, for example, a coil spring.

In another preferred embodiment, the cylindrical member is provided with a graduation value along the circumferential direction, while the injector casing is provided with a graduation opening window for exposing the graduation value of the cylindrical member. .. In such an embodiment, the scale numerical values of the cylindrical members are composed of a first numerical value string and a second numerical value string that are adjacent to each other, and the scale opening windows are provided so as to form a pair on the opposite side surfaces of the injector casing. It is composed of a first opening window and a second opening window, and the numbers in the first numerical column are exposed from the first opening window, while the numbers in the second numerical column are exposed from the second opening window.

Further, in the present invention, it is an injector for firing a lancet of a lancet assembly to be used for puncturing, and includes a plunger for firing the lancet in the puncturing direction and an injector casing containing the plunger.
Injector lancet assembly holding mechanism,
It consists of a lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly, and a metal holder holding member attached to the lancet assembly receiving member.
An injector is also provided in which the holder holding member holds the holder when the lancet assembly is loaded onto the injector so that the holder of the lancet assembly fits into the lancet assembly receiving member.

One of the features of the injector according to the present invention is that the lancet assembly holding mechanism has "a lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly" and "lancet assembly receiving member". It has a "metal holder holding member" attached to the member. In particular, when the lancet assembly is loaded onto the injector so that the lancet assembly holder fits in the lancet assembly receiving member, the holder holding member holds the holder. As a result, the lancet assembly can be suitably held by the injector when the lancet assembly is loaded into the injector.

In some preferred embodiments of the injector according to the invention, the holder holding member has elastic properties. In such an embodiment, the holder of the lancet assembly is sandwiched by the holder holding member due to the elastic force of the holder holding member.

The overall form of the holder holding member has a substantially ring form, for example, a ring form with a partial notch. Further, the holder holding member is not limited to a single item, and may be composed of a plurality of parts. For example, the holder sandwiching member has a two-part configuration composed of a sub-pinching member A and a sub-pinching member B, and the sub-pinching member A and the sub-pinching member B may be arranged to face each other.

It is preferable that the holder holding member has a locally curved portion that is partially curved or bent inward. In the case of the "two-part configuration", it is preferable that each of the sub-holding member A and the sub-holding member B has a locally curved portion. When the holder holding member has a local curved portion, the locally curved portion should be in contact with the outer surface portion of the holder of the lancet assembly (such as the outer peripheral surface of the holder and the peripheral ridge portion of the holder provided therein) when the lancet assembly is loaded into the injector. Is preferable. Further, it is preferable that the holder holding member is attached so as to be in close contact with the outer surface of the lancet assembly receiving member, and on the inner surface of the lancet assembly receiving member, the locally curved portion of the holder holding member is formed from the notch portion of the lancet assembly receiving member. It is preferably exposed. It is also preferable that at least a part of the inner surface of the locally curved portion has a dome shape (that is, the inner surface of the locally curved portion has a dome-shaped portion). That is, preferably, the holder contact surface of the holder holding member has a substantially hemispherical shape.

When the holder holding member is composed of the sub holding member A and the sub holding member B, the lancet assembly receiving member is also "the sub receiving member A positioned on the front side of the injector" and "the sub receiving member positioned on the rear side of the injector". It is preferable to have a two-part configuration composed of "B". Further, it is preferable that the sub-receptive member A has a ring shape as a whole. In such a case, it is preferable that the sub-receptive member A is provided with a pair of rearward protrusions protruding rearward, and the pair of rearward protrusions are positioned on the sub-holding member A and the sub-holding member B. ..

An injector having a "puncture depth adjusting mechanism" and / or a "lancet assembly holding mechanism" as described above has an ejector. That is, it further has an ejector for ejecting the lancet assembly loaded in the injector.

In one preferred embodiment, the ejector is provided with an elastic portion, while the injector casing is provided with a protrusion on the inner wall surface. When the lancet assembly is loaded into the injector to engage the lancet and the plunger with each other, it is preferable that the elastic portion of the ejector once abuts on the protrusion of the injector and then gets over the protrusion. In particular, it is preferable that the lancet and the plunger are completely engaged when the elastic portion of the ejector gets over the protrusion of the injector.

The ejector has, for example, an elongated shape, and it is preferable that an elastic portion is provided at the tip of the ejector having such an elongated shape. Further, the elastic portion preferably has a branched form extending rearward so as to branch from the ejector body.

Further, it is preferable that the injector having the "puncture depth adjusting mechanism" and / or the "lancet assembly holding mechanism" has a "recharge mechanism". Specifically, the injector is used for retracting the plunger to the ejector. It is preferable to have a contact portion. In such a case, when the ejector is moved rearward after puncturing, the plunger retracting contact portion of the ejector comes into contact with the plunger, and as a result, the push received from the ejector. Since the plunger can be retracted due to the pressure, it can be "recharged".

The present invention also provides a lancet assembly composed of a lancet and a holder for accommodating the lancet. In such a lancet assembly, the lancet comprises a lancet body, a lancet cap and a puncture needle, and a metal puncture needle is present in these across the resin lancet body and the lancet cap and is punctured by the lancet cap. The tip of the needle is covered. And the lancet cap of the lancet is
Needle tip protection that protects the puncture needle,
It has a cap head part that is connected to the needle tip protection part and is positioned most forward by the lancet cap, and a pair of rear extending parts that are connected to the cap head part and extend rearward from the cap head part. Made up of
A posterior extension of the lancet cap extends along the outer surface of the holder's fuselage.

One of the features of the lancet assembly according to the present invention is that it has a pair of rear extending portions extending rearward from the cap head portion. In particular, the posterior extending portion of the lancet cap extends along the outer surface of the holder's fuselage. This makes it possible to prevent the inconvenience of the needle tip bending or breaking when the cap is removed. In addition, "the rear extending portion of the lancet cap extends along the outer surface on the outer surface of the body of the holder" as used herein means at least the central portion of the rear extending portion of the lancet cap ( The central portion along the width direction of the posterior extension) extends along the lateral surface of the holder fuselage so as to be close to or in contact with it.

In one preferred embodiment, when the lancet cap is removed from the lancet, the rear extension can be rotated so that the rear extension of the lancet cap slides on the outer surface of the holder's fuselage, thereby the needle. It is possible to more preferably prevent the tip from bending or breaking.

In one preferred embodiment, the inner surface of the posterior extension of the lancet cap and the outer surface of the holder's fuselage are in close proximity to or in close contact with each other. Further, it is preferable that at least a part of the inner surface of the rear extending portion of the lancet cap and at least a part of the outer surface of the body of the holder have complementary forms to each other. Further, where the rear extending portion of the lancet cap has a long shape, it is preferable that the rear extending portion extends rearward so that its free end extends outward.

The lancet assembly of the present invention has a shape feature in which the posterior extending portion of the lancet cap extends preferably long. In particular, the rear extending portion of the lancet cap extends long in light of the relationship between the position of the needle tip and / or the position of the rear end of the needle tip protection portion. Specifically, the posterior extension extends posteriorly so that the free end / tip of the posterior extension of the lancet cap is positioned posterior to the needle tip position of the puncture needle or the posterior end of the needle tip protection. Exists. In one preferred embodiment, the posterior extension of the lancet cap extends to the lancet body (in other words, is long so that the free end of the posterior extension is positioned above the lancet body. The posterior extension of the shape extends long posteriorly from the cap head).

In another preferred embodiment, the fuselage of the holder is not provided with an opening, and the needle tip protector of the lancet cap and the lancet body are housed in the holder without protruding from the holder.

In yet another preferred embodiment, the lancet body comprises a pair of flexible protrusions and a pair of flexed shape variable positions. It is preferable that the pair of flexible protrusions are provided on the front side of the lancet body, whereas the pair of bending shape variable positions are provided on the rear side of the lancet body. The bent shape variable position portion preferably has a hollow shape.

When the lancet body is provided with a bent shape variable position portion, it is preferable that the holder is provided with a locked portion for locking the bent shape variable position portion. In such a case, it is particularly preferable that the bent portion of the bent shape variable position portion is positioned so as to be locked to the locked portion of the holder.

Furthermore, the present invention also provides a puncture device. That is, a puncture device composed of the above-mentioned injector and lancet assembly is provided.

One of the features of the puncture device according to the present invention is an injector having a suitable "puncture depth adjusting mechanism" and / or a "lancet assembly holding mechanism", and a lancet assembly having a suitable "cap removal mechanism". The puncture device is configured from.

A circumferential ridge may be provided on the outer peripheral surface of the holder of the lancet assembly used for the puncture device. In one preferred embodiment, when the lancet assembly is loaded into the injector, the circumferential ridge of the holder comes into contact with the dome-shaped portion of the holder holding member once, and then gets over the dome-shaped portion. When the circumferential ridge of the holder gets over the dome-shaped portion of the holder holding member, a click feeling is provided to the user.

In another preferred embodiment, the holder comprises a "further locked portion" for locking the flexed shape variable position portion in the lancet assembly.
When only the lancet is moved forward after the lancet and the plunger are engaged with each other and the lancet assembly is loaded into the injector, the bent part of the variable bending shape of the lancet body becomes the holder's "further engagement". Lock to the "stop". The "locked portion" and the "further locked portion" for locking the bent shape variable position portion have, for example, the form of an opening provided in the holder.

In the injector provided with the "puncture depth adjusting mechanism" according to the present invention, the user is provided with a "click feeling suitable for adjusting the puncture depth". Specifically, a spring member (particularly, "axial direction of the injector"). A puncture where a part of the uneven part of the cylindrical member and the complementary shape part of the injector casing are held by the pressing force applied from the cylindrical member and the spring member provided side by side along the line. When the cylindrical member is rotated to adjust the depth, a part of the uneven portion of the cylindrical member that abuts on the complementary shape portion of the injector casing changes to another part, and at that time, the spring member A click feeling is provided due to the pressing force. More specifically, under the condition that the pressing force of the spring member always works, the contact state between "a part of the uneven portion of the cylindrical member" and "the complementary shape portion of the injector casing" is changed to "the uneven portion of the cylindrical member". A "suitable click feeling" is provided to the user because the contact state of "another part of the injector casing" and "the complementary shape portion of the injector casing" are instantly switched to another contact state.

Further, the injector provided with the "lancet assembly holding mechanism" according to the present invention exhibits a sufficient function in holding the lancet assembly on the injector. Specifically, the holder holding member attached to the lancet assembly receiving member can appropriately hold the lancet assembly during or after loading to the injector. In particular, the lancet assembly can be appropriately held with respect to the injector due to the elastic force of the holder holding member. Since it is held in this way, for example, when the holder of the lancet assembly is pressed against the puncture site to perform puncture, the inconvenience that the holder tilts with respect to the injector (particularly the "lancet assembly receiving member") is prevented, which is preferable. Puncture can be provided. Further, since the holder holding member is made of metal in the first place, it is hard to be worn even after repeated use, and the holding force is prevented from being lowered. Similarly, because it is made of metal, it is less susceptible to fluctuations due to temperature, and can provide a certain holding power regardless of the place of use, the season of use, and the like.

Further, in the lancet assembly provided with the "cap removal mechanism" according to the present invention, when the lancet cap is removed from the lancet, the rear extending portion of the lancet cap slides on the outer surface of the body of the holder. Can be rotated. As a result, most of the force exerted on the puncture needle when the cap is removed can be converted into the rotational force of the puncture member, and the force exerted on the tip of the puncture needle can be reduced as much as possible. Therefore, damage to the puncture needle such as bending or breaking when the cap is removed is preferably prevented. In particular, recently, there is a tendency to use an ultra-fine puncture needle, and even such an ultra-fine puncture needle can suitably prevent bending of the needle tip. When the bending of the puncture needle is prevented, the trajectory of the puncture needle becomes substantially linear, and as a result, the pain felt by the punctured person (that is, the blood sampled person) at the time of puncturing can be reduced. This is not bound by a specific theory, but is thought to be due to the fact that the puncture needle reduces the phenomenon that the puncture site of the blood sampler is "gouged". Further, in the lancet assembly of the present invention, the "bending" of the puncture needle is prevented, and since the same removal operation can always be guaranteed even if the user is different, the puncture tip is substantially constant. An exposed state can be obtained. Therefore, even when the users are different, the puncture trajectory of the puncture needle becomes substantially constant, and the effect of reducing the variation among the users can be achieved.

FIG. 1 is a perspective view showing the appearance of the puncture device of the present invention. FIG. 2 is a perspective view showing the lancet assembly of the present invention and the lancets and holders constituting the lancet assembly. FIG. 3 is a perspective sectional view showing the internal structure of the injector of the present invention. FIG. 4 is a perspective view showing a usage mode of the puncture device of the present invention (before the lancet assembly is loaded into the injector). FIG. 5 is a perspective view showing a usage mode of the puncture device of the present invention (when the lancet assembly is loaded into the injector). FIG. 6 is a perspective view showing a usage mode of the puncture device of the present invention (when the lancet cap is removed). FIG. 7 is a perspective view showing a usage mode of the puncture device of the present invention (at the time of puncture). FIG. 8 is a perspective view showing the appearance of the injector of the present invention. FIG. 9 is a perspective view showing the internal structure and components of the injector of the present invention. FIG. 10 is a perspective view showing the internal structure and components of the injector of the present invention. FIG. 11 is a schematic view for explaining the puncture depth adjusting mechanism. FIG. 12 is a schematic view for explaining the puncture depth adjusting mechanism. FIG. 13 is a schematic view for explaining the puncture depth adjusting mechanism. FIG. 14 is a schematic view for explaining the puncture depth adjusting mechanism. FIG. 15 is a perspective view showing a “lancet assembly receiving member” and a “holder holding member” used in the lancet assembly holding mechanism. FIG. 16 is a schematic view for explaining the lancet assembly holding mechanism. FIG. 17 is a cross-sectional view schematically showing the change over time of the puncture device during use (before loading the lancet assembly). FIG. 18 is a cross-sectional view schematically showing the change with time of the puncture device during use (during loading of the lancet assembly). FIG. 19 is a cross-sectional view schematically showing the change over time of the puncture device during use (completion of engagement between the lancet and the plunger). FIG. 20 is a cross-sectional view schematically showing the change over time of the puncture device during use (loading completed / charging completed). FIG. 21 is a cross-sectional view schematically showing the change with time of the puncture device during use (at the time of puncture). FIG. 22 is a cross-sectional view schematically showing the change over time of the puncture device during use (after puncture). FIG. 23 is a cross-sectional view schematically showing the change with time of the puncture device during use (lancet assembly discharge). FIG. 24 is a cross-sectional view schematically showing the time course of the puncture device during recharging. FIG. 25 is a schematic view showing the appearance of the lancet assembly. FIG. 26 is a schematic view showing the internal structure of the lancet assembly. FIG. 27 is a cross-sectional view of the lancet with the cap removed. FIG. 28 shows a preferred modification of the lancet assembly receiving member and the lancet holder. FIG. 29 shows an example of a suitable modified form of the needle tip protection portion. FIG. 30 is a perspective view showing the appearance of a lancet assembly having a suitable form. FIG. 31 is an external perspective view of the lancet assembly shown in FIG. 30 (A). FIG. 32 is an external plan view of the lancet assembly shown in FIG. 30 (A). FIG. 33 is a plan view of the internal structure of the lancet assembly shown in FIG. 30 (A). FIG. 34 is a perspective view showing a holder holding member and a lancet assembly receiving member having a suitable form. FIG. 35 is a perspective view showing a holder holding member and a lancet assembly receiving member having a suitable form. FIG. 36 is a perspective view showing a holder holding member, a lancet assembly receiving member, and a lancet holder having a suitable form. FIG. 37 is a schematic view for explaining the click feeling caused by the holder holding member. FIG. 38 is a perspective view and an end view showing a lancet assembly having a suitable form related to prevention of needle exposure due to half-missing of the lancet. FIG. 39 is a cross-sectional view (no load state before use) showing a lancet assembly having a suitable form related to prevention of needle exposure due to half-missing of the lancet. FIG. 40 is a cross-sectional view (drawing out of the lancet before use) showing a lancet assembly having a certain suitable form related to prevention of needle exposure due to half-missing of the lancet. FIG. 41 is a cross-sectional view (no load state after completion of loading of the lancet assembly) showing a lancet assembly having a certain suitable form related to prevention of needle exposure due to half-missing of the lancet. FIG. 42 is a cross-sectional view (drawing of the lancet after the loading of the lancet assembly is completed) showing a lancet assembly having a certain suitable form related to prevention of needle exposure due to half-missing of the lancet. FIG. 43 is a cross-sectional view (drawing of the lancet after the loading of the lancet assembly is completed) showing a lancet assembly having a certain suitable form related to prevention of needle exposure due to half-missing of the lancet. FIG. 44 is a cross-sectional view (after being pulled out of the injector / before removing the cap) showing a lancet assembly having a suitable form related to prevention of needle exposure due to half-missing of the lancet. FIG. 45 is a cross-sectional view (after being pulled out of the injector / after removing the cap) showing a lancet assembly having a suitable form related to prevention of needle exposure due to half-missing of the lancet. 46 (a)-(e) are cross-sectional views showing a puncture device according to a suitable injector form related to needle exposure prevention. FIG. 47 is a perspective view showing the appearance of the lancet assembly (conventional technique). FIG. 48 is a perspective view showing the appearance of the injector (conventional technique). FIG. 49 is a perspective view showing the appearance of the lancet (conventional technique). FIG. 50 is a perspective view when the lancet of FIG. 49 is divided in half so that the inside of the lancet can be seen (conventional technique). FIG. 51 is a perspective view showing a mode before the lancet assembly is loaded into the injector (conventional art). FIG. 52 is a perspective view showing a mode in which the lancet is gripped by the tip of the plunger by loading the lancet assembly (conventional technique). FIG. 53 is a perspective view showing a mode in which the plunger cannot be retracted after the loading of the lancet assembly is completed (conventional technique). FIG. 54 is a perspective view showing a mode in which the lancet cap is removed to enable puncture (conventional technique).

The present invention will be described with reference to the accompanying drawings. The present invention relates to injectors, lancet assemblies and puncture devices. First, the configuration of the puncture device will be described, and then the injector and the lancet assembly will be described. Since the puncture device is composed of an injector and a lancet assembly, the detailed description of the puncture device itself will be substantially described as the respective description of the injector and the lancet assembly.

As described above, the term used in the present specification refers to the "puncture direction" in which the injector plunger or the lancet body of the lancet assembly moves during puncture as the "forward" direction, and the opposite direction as the "rear" direction. The direction. In the injector, the direction from the grip of the ejector to the casing opening corresponds to the "forward direction" / "puncture direction", and in the lancet assembly, the direction from the opening end of the case to the puncture opening is the "forward direction". / Corresponds to "puncture direction". Further, the "transverse direction" substantially means a direction orthogonal to the puncture direction. The directions used in the text of these specifications are shown in the drawings.

<< Overall configuration and usage of the puncture device >>

(Overall configuration of puncture device)
FIG. 1 shows the puncture device 1000. As shown in FIG. 1, the puncture device 1000 according to the present invention includes a lancet assembly 100 and an injector 200.

The lancet assembly 100 is a member provided with a puncture needle and is a member to be used for actual puncture. The lancet assembly 100 includes a lancet 130 provided with a puncture needle and a holder 170 in which the lancet is housed (see FIG. 2). The term "assembly" in the "lancet assembly" is used in view of the fact that these lancets and holders are combined with each other.

The injector 200 is a member having a firing function and is used together with the lancet assembly. That is, by using the injector 200, the "lancet provided with the puncture needle" can be fired at the place to be punctured. The injector 200 includes at least a plunger 220 that launches the lancet in the puncture direction and an injector casing 210 that includes the plunger (see FIGS. 1 and 3).

(Usage configuration of puncture device)
When using the puncture device, as shown in FIGS. 4 and 5, the operation of first loading the lancet assembly 100 into the injector 200 is performed. Loading is performed by fitting the lancet assembly 100 into the front end opening 201 of the injector 200, as shown. Specifically, the lancet assembly 100 is inserted into the injector 200 so that the holder 170 of the lancet assembly 100 is partially fitted into the lancet assembly receiving member 202 of the injector 200. During such loading, the lancet will engage the injector's plunger 220. Further, the lancet comes into contact with the plunger 220 prior to or with such engagement, but the lancet is pushed into the injector, so that the plunger retracts inside the injector. Specifically, as the insertion of the lancet assembly proceeds, the lancet body 140 (see FIG. 2) held and fixed to the holder 170 presses the plunger 220, and the plunger 220 retracts. As shown in FIGS. 4 and 5, the plunger 220 is provided with a fire spring 220a. In particular, in the present invention, the fire spring 220a is arranged inside the fuselage cylinder portion 221 of the plunger 220. The retreat of the plunger 220 means that the plunger 220 is pushed down against the force of the fire spring 220a. Therefore, the spring 220a of the plunger is suitably compressed, and the force required for firing the lancet is stored in the plunger 220. Eventually, as shown in FIG. 5, the plunger retracts until the trigger protrusion 220b of the plunger 220 locks with the rear protrusion 230a of the trigger lever 230 to obtain a cocking state. .. The trigger lever 230 is a member for causing the lancet to fire with respect to the lancet assembly loaded in the injector. In the lancet assembly before or during loading, the lancet (especially the lancet body) is held and fixed to the holder due to the engagement between the lancet and the holder, but in the lancet assembly that has been loaded, it takes. Since the engagement is released, the lancet body equipped with the puncture needle becomes movable with respect to the holder. That is, it is in a state where it can be fired in the puncture direction.

After the loading of the lancet assembly into the injector is completed, the operation of removing the lancet cap 150 is then performed as shown in FIG. At the time of puncture, the front end of the lancet assembly is applied to a predetermined portion (for example, a fingertip) to be punctured, and then the tip 230b of the trigger lever is pushed toward the inside of the injector (see FIG. 7). As a result, the cocking state between the rear protrusion 230a of the trigger lever 230 and the protrusion 220b of the plunger 220 is released, and as a result, the compressed spring 220a is instantaneously extended, and the plunger 220 moves forward. Is fired. That is, the "lancet body provided with the puncture needle" attached to the plunger 220 is fired in the anterior puncture direction, and the puncture is performed. FIG. 7 shows a mode in which the puncture is performed by pushing the front end portion 230b of the trigger lever toward the inside of the injector 200, that is, a mode in which the puncture needle 143 is exposed from the front end of the lancet assembly.

In the following, the injector 200 and the lancet assembly 100 constituting the puncture device 1000 will be described in detail.

<< Overall configuration / function of injector >>
8 to 10 show the injector 200 according to the present invention. FIG. 8 shows the appearance of the injector 200, and FIGS. 9 and 10 show the internal structure of the injector 200 and show the main components of the injector 200. Specifically, in FIGS. 9 and 10, "plunger 220", "cylindrical member 240 of the puncture depth adjusting mechanism", "spring member 250 of the puncture depth adjusting mechanism", and "lancet of the lancet assembly holding mechanism". "Assembly receiving member 202", "Holder holding member 260 of the lancet assembly holding mechanism", "Ejector 270" and the like are shown.

As shown in FIGS. 9 and 10, the casing 210 of the injector 200 is a member that includes various components of the injector including the plunger 220. The injector casing 210 is preferably made of a resin material. Further, the injector casing 210 may be composed of, for example, two divided sub-members, and may be a combination thereof. As shown in FIG. 8, the casing 210 may be provided with leg protrusions 218 that function as legs. When the leg protrusion 218 is provided, the injector 200 can be stably placed as a whole (more specifically, the injector 200 is substantially horizontally stable so that the leg protrusion 218 is in contact with the installation surface). You can leave it at).

The plunger 220 is arranged along the axial direction of the injector 200, that is, the longitudinal direction of the injector, and has a function of firing the lancet (particularly the lancet body) in the puncture direction. As shown in FIG. 10, the tip end 222 of the plunger 220 can be engaged with the rear end portion 145 (see FIG. 2) of the lancet body 140. When loading the lancet assembly 100 into the injector 200, the front end 222 of the plunger 220 and the rear end 145 of the lancet body 140 are engaged with each other. Further, when the lancet body 140 is inserted rearward along with the loading, the plunger 220 is pushed rearward (see FIGS. 17 and 18). As a result, the fire spring 220a of the plunger 220 is compressed, and the force required for firing the puncture needle is stored in the plunger 220.

(Puncture depth adjustment mechanism)
The injector 200 of the present invention has a "puncture depth adjusting mechanism". Such a puncture depth adjusting mechanism is provided inside the injector. The members that contribute to the puncture depth adjusting mechanism are mainly the "plunger protrusion 225", the "cylindrical member 240" and the "spring member 250" (see FIGS. 9 and 10).

The protrusion 225 of the plunger is provided on the plunger 220, and protrudes outward from the plunger 200 in the transverse direction thereof. The protruding portion 225 cooperates with the cylindrical member 240 at the time of puncture. For example, as shown in FIG. 10, it is preferable that the front end surface of the protrusion 225 is flat, and the normal of the front end surface is the axial direction of the injector (that is, the longitudinal axis of the injector). It is preferable that they are substantially parallel to.

As shown in FIG. 11, the cylindrical member 240 includes an uneven portion 242 and a step portion 246. As shown, the uneven portion 242 is preferably provided in the end region of the outer peripheral surface of the cylindrical member 240. Further, it is preferable that the uneven portion 242 has a form that is periodically continuous along the circumferential direction of the cylindrical member. On the other hand, the step portion 246 is preferably provided on the inner peripheral surface of the cylindrical member 240. Since the step portion 246 is provided on the inner peripheral surface of the cylindrical member 240, it is shown by a dotted line in the lower perspective view of FIG. Such uneven portions 242 and / or step portions 246 may constitute parts separate from the cylindrical member 240, or may be integrated with the cylindrical member 240 (“integration”). In the case of, the uneven portion 242 and / or the step portion 246 may be integrally formed at the time of molding the cylindrical member 240. That is, the form of the outer peripheral surface and / or the inner peripheral surface of the cylindrical member 240 itself , Concavo-convex portion 242 and / or step portion 246 may have the form). The plunger 220 is installed through the cylindrical member 240 so that the protruding portion 225 is located inside the cylindrical member 240 and behind the step portion 246.

As shown in FIGS. 9 to 11, the spring member 250 is provided side by side with the cylindrical member 240 along the axial direction of the injector (that is, the longitudinal axis of the injector). That is, the spring member 250 and the cylindrical member 240 are arranged adjacent to each other along the longitudinal direction of the injector. It can be said that the spring member 250 is provided in the injector casing so that the spring expansion and contraction is exhibited in the axial direction of the injector (that is, the longitudinal direction of the injector). As shown in the figure, the spring member 250 may be, for example, a coil spring.

In such a puncture adjustment mechanism, when the plunger 220 moves forward during puncture, the protrusion 225 of the plunger moves in the "A direction" (puncture direction) as shown in FIG. 12, and the cylindrical member 240. By finally colliding with the step portion 246 of the plunger 220, the plunger 220 cannot move further forward. As a result, the cylindrical member 240 is rotated about its axis, and the step portion 246 that the protruding portion 225 collides with is changed to a step portion having a different height (for example, a change from the step portion 246a to 246b). Allows the plunger 220 to change the distance it can move forward during puncture. That is, the puncture depth can be adjusted.

The concavo-convex portion 242 of the cylindrical member has a normal line of the surfaces (242a, 242b, 242c, ...) Forming the concavo-convex portion substantially parallel to the axial direction of the injector (see FIG. 9). The injector casing 210 is provided with a complementary shape portion 215 having a shape complementary to a part of the uneven portion 242. FIG. 9 clearly shows the complementary shape portion 215 provided on the inner wall surface of the injector casing. The complementary shape portion 215 may be formed by integral molding with the inner wall surface of the injector casing (that is, a part of the inner wall surface of the injector casing has a shape complementary to a part of the uneven portion 242. You may have). In the puncture depth adjusting mechanism of the injector according to the present invention, the contact state between a part of the uneven portion 242 of the cylindrical member and the complementary shape portion 215 of the injector casing is maintained by the pressing force applied from the spring member 250. ing. As shown in FIG. 13, a spring member 250 is provided adjacent to the cylindrical member 240 on the rear end side of the cylindrical member 240, and the cylindrical member 240 is urged forward. is there. Therefore, the uneven portion 242 provided at the front end of the cylindrical member 240 is in a state of being pressed against the complementary shape portion 215 of the injector casing 210.

When adjusting the puncture depth by rotating the cylindrical member, as shown in FIG. 13, a part 242a of the uneven portion 242 of the cylindrical member that abuts on the complementary shape portion 215 of the injector casing is another part 242b. Will change to. Even during such a change, since the cylindrical member 240 is still urged forward due to the spring member 250, the complementary shape portion 215 and another part 242b are vigorously fitted to each other. It will be a match, and as a result, a "click feeling" will occur. That is, a suitable click feeling is provided to the user when the cylindrical member is rotated with the fingertip to adjust the puncture depth.

From the viewpoint of the spring member 250, the shape of the spring member 250 changes temporarily when the puncture depth is adjusted. Specifically, when a part 242a of the uneven portion 242 that abuts on the complementary shape portion 215 of the injector casing changes to another part 242b, the spring member 250 temporarily contracts. That is, as shown in FIG. 13, after the "contact state between the complementary shape portion 215 and a part 242a of the uneven portion" is released, the next "complementary shape portion 215 and another part 242b of the uneven portion 242b" When switching to the "contact state", the spring member 250 contracts once and then returns to the original form.

The puncture adjustment mechanism according to the present invention is provided with an "adjustment dial" that is easier for the user to understand. This will be described in detail.

As shown in FIG. 14, the cylindrical member 240 is provided with a scale value 248 along the circumferential direction, while the injector casing is provided with a scale opening window 216 for exposing the scale value of the cylindrical member. There is. As shown, the scale numerical value 248 of the cylindrical member is composed of a first numerical value column 248a and a second numerical value column 248b that are adjacent to each other. Correspondingly, the opening window 216 for the scale of the injector casing is composed of the first opening window 216a and the second opening window 216b. More specifically, the scale opening window 216 is configured from the first opening window 216a and the second opening window 216b provided so as to form a pair on the opposite side surfaces of the injector casing.

Such a first numerical value sequence 248a and a second numerical value sequence 248b are preferably combined with the first opening window 216a and the second opening window 216b. Specifically, as shown, the individual numerals in the first numeric sequence 248a of the cylindrical member 240 are exposed from the first opening window 216a of the injector casing, and the individual numerals in the second numeric column 248b of the cylindrical member 240 are exposed. The numbers are exposed through the second opening window 216b.

In such an adjustment dial, the first numerical value string 248a displayed from the first opening window 216a and the first numerical value string 248b displayed from the second opening window 216b are independent of each other. In this regard, in the conventional injector, the scale values are provided in a single row, and they are displayed from "two opening windows provided so as to form a pair on the opposite side surfaces of the injector casing". In that respect, it was never preferable. Specifically, in the prior art, it is difficult to adjust the arrangement of the numbers exposed from one opening window and the numbers exposed from the other opening window, and the relative positions of the paired opening windows are not always suitable. There wasn't. For example, while one opening window can be provided in the central portion of the body, the other opening window needs to be provided so as to be offset above or below the central portion of the body. In the adjustment dial according to the present invention, the first numerical value string 248a displayed from the first opening window 216a and the first numerical value string 248b displayed from the second opening window 216b are independent of each other, so that the above measures are essential. Is avoided. Further, since the numerical string is divided into two and displayed in the first place, the numerical value itself of each numerical string can be increased, and an injector that is easy for the user to see can be provided. That is, although the injector is compact in the present invention, the numerical display of the adjustment dial is not smaller than necessary, and a user-friendly injector is provided.

(Lancet assembly holding mechanism)
The injector of the present invention has a "lancet assembly holding mechanism". Such a mechanism is a mechanism for preferably holding the holder of the lancet assembly loaded or loaded in the injector with respect to the injector. The members that contribute to the lancet assembly holding mechanism are mainly the "lancet assembly receiving member 202" and the "holder holding member 260" (see FIG. 9).

As shown in FIG. 9, the lancet assembly receiving member 202 is provided in the front end opening of the injector to receive the lancet assembly inserted at the time of use. That is, the lancet assembly can be loaded into the injector so that a part of the lancet holder 170 fits in the receiving member 202 (see FIGS. 4 and 5). As shown, the lancet assembly receiving member 202 preferably has a tubular shape as a whole.

As shown in FIG. 15, it is preferable that the lancet assembly receiving member 202 is provided with a circumferential groove portion 202a on the outer surface of the body thereof and is provided with a notch portion 202b in the groove portion region. As shown, the notch 202b may have an open shape.

The holder holding member 260 is attached to the lancet assembly receiving member 202 as shown in FIGS. 9 and 15. The holder holding member 260 is preferably a member made of metal such as SUS. The holder holding member 260 is a member capable of exhibiting elastic characteristics. In particular, it is preferable that the holder holding member 260 is a member that can be elastically deformed in the outer and inner directions of the injector in the state of being provided on the injector (for example, in the aspect shown in FIG. 15, in the A direction due to an external force). It is preferable that a force that tends to return to the original shape in the opposite direction when it spreads to the holder holding member 260 acts on the holder holding member 260).

Further, as shown in the drawing, the overall form of the holder holding member 260 may be a substantially ring form, for example, a ring form with a partial notch. Such a "ring-shaped holder holding member 260 with a partial notch" is particularly liable to be elastically deformed with the "partially notched portion" as a base point.

In particular, as shown in FIG. 15, the holder holding member 260 has a locally curved portion 265 in which a part thereof is locally curved or bent inward. As the local bending portion 265, as shown in the drawing, two local bending portions (265a, 265b) may be provided so as to form a pair with each other. The number of such locally curved portions 265 is not particularly limited to two, and may be one, three or more.

As shown in FIG. 15, it is preferable that at least a part of the inner surface of the locally curved portion 265 has a dome shape (or a “hemispherical shape”). More specifically, a part of the inner surface of the locally curved portion 265 (reference number 265'in FIG. 15) is preferably locally raised inward, and the raised is continuously and smoothly curved. It is preferable that the curved surface form is as described above.

As shown in FIGS. 9 and 15, the holder holding member 260 is attached to the outside of the lancet assembly receiving member 202 as a whole so as to be in close contact with the outer peripheral surface of the lancet assembly receiving member 202. More specifically, it is preferable that the holder holding member 260 is provided so as to be fitted into the circumferential groove portion 202a of the holder holding member 260. Here, the locally curved portion 265 of the holder holding member 260 is provided so as to be positioned at the notch opening 202b of the lancet assembly receiving member 202. Therefore, on the inner peripheral surface of the lancet assembly receiving member 202, the locally curved portion 265 of the holder holding member 260 is formed from the notch portion 202b of the lancet assembly receiving member 202 (for example, the notch portion in the opening form as shown in FIG. 15). It is exposed.

As shown in FIG. 16A, the locally curved portion 265 of the holder holding member 260 is preferably positioned slightly inward from the inner surface of the lancet assembly receiving member 202. More specifically, it is preferable that the top of the dome-shaped portion 265'of the locally curved portion 265 is positioned at least inside the inner surface of the assembly receiving member 202.

FIG. 16B shows a state in which the holder 170 of the lancet assembly is inserted into the lancet assembly receiving member 202. As can be seen from FIG. 16B, the holder 170 inserted or inserted into the lancet assembly receiving member 202 is sandwiched by the holder sandwiching member 260 with the local curved portion 265 as a base point. More specifically, when the dome-shaped portion 265a of the locally curved portion 265 comes into contact with the outer peripheral surface of the holder 170, the holder holding member 260 is slightly expanded outward, while the resulting “holder holding member” is generated. The holder 170 is preferably held by the "elastic force of".

Since it is held favorably in this way, for example, when the holder of the lancet assembly is pressed against the puncture site to perform puncture, the holder is prevented from being tilted and displaced with respect to the injector (particularly, the "lancet assembly receiving member"). And the desired puncture can be provided. Further, since the holder holding member is made of metal in the first place, it is less likely to be worn by repeated use, and a decrease in holding force is preferably prevented.

By the way, due to the dome-shaped portion 265', the contact between the locally curved portion 265 and the outer peripheral surface of the holder 170 is "point contact", so that excessive resistance to the insertion of the holder 170 is not generated. It has become. That is, in the lancet assembly holding mechanism according to the present invention, while the holder 170 inserted into the injector is suitably held by the lancet assembly receiving member 202 (for such holding, "friction" between the holder 170 and the holding member is performed. Although "resistance" contributes effectively), smooth holder insertion is ensured moderately even in a mode that causes such frictional resistance.

(Mechanism related to ejector)
Next, the "ejector-related mechanism" of the injector according to the present invention will be described with reference to FIGS. 17 to 23. 17 to 23 show the loading operation of the lancet assembly 100, the completion of the loading, the puncture, and the discharge of the lancet assembly 100 after the puncture over time. That is, FIGS. 17 to 23 show the time course of the lancet assembly 100 and the injector 200 (that is, the puncture device composed of them) in the order of their numbers.

The injector of the present invention has an ejector 270 (see FIG. 10). The ejector 270 is essentially used to eject the "used lancet assembly", that is, to eject the "lancet assembly already subjected to the puncture process" from the injector.

FIG. 22 shows the lancet assembly 100 and the injector 200 after puncture. As can be seen from the illustrated embodiment, the ejector 270 is arranged so that the tip portion 272 of the ejector 270 can come into contact with the rear end of the holder 170 of the lancet assembly 100. Therefore, by moving the ejector forward, the holder 170 is pressed from the rear by the ejector 270. As shown in FIG. 23, when the ejector is driven, the lancet assembly 100 is moved forward so as to be separated from the injector. Therefore, finally, the used lancet assembly 100 is discharged from the injector.

In the injector of the present invention, the ejector 270 functions not only for discharging the lancet assembly 100 but also for loading the lancet assembly 100. Specifically, the ejector 270 also plays a role of giving a "click feeling" suggesting that the loading is completed (more specifically, the engagement between the lancet and the plunger is completed) when the lancet assembly 100 is loaded.

A portion that particularly contributes to producing a “click feeling” suggesting that the loading is completed is an elastic portion 275 (see FIGS. 10 and 17) provided in the ejector 270. The elastic portion 275 cooperates with the protrusion 212 (see FIG. 17) provided on the inner wall surface of the injector casing 210 to provide a “click feeling” indicating the completion of loading. This will be described in detail below.

When the lancet assembly is loaded onto the injector to engage the lancet and plunger with each other, the ejector 270 is pushed rearward by the holder 170 of the lancet assembly 100, causing the ejector 270 to be inside the injector. Move backwards. Specifically, the rear end of the holder 170 of the loaded lancet assembly comes into contact with the front end of the ejector 270, and as a result, the ejector is pressed backward and moves from the contact portion. When the ejector 270 moves backward in this way, the elastic portion 275 of the ejector 270 once abuts on the protrusion 212 of the injector, and then gets over the protrusion 212. When overcoming this, the ejector is temporarily blocked from moving backward, and then it is released instantly, so the user (the user who picks up the holder 170 and inserts it into the injector) has a "click feeling". Brought to you.

In particular, when the elastic portion 275 of the ejector gets over the protrusion 212 of the injector, the lancet and the plunger are completely engaged, and the holder 170 of the lancet assembly 100 finally fits in the lancet assembly receiving member 202. Then, the loading is practically completed. In other words, the "generation of click feeling" and the "completion of engagement between the lancet and the plunger" / "completion of loading" are linked to each other, and for the user, the engagement is completed by such "click feeling" / The completion of loading can be grasped more clearly sensuously.

FIG. 18 shows a mode immediately before the elastic portion 275 of the ejector gets over the protrusion 212 of the injector, whereas FIG. 19 shows a mode immediately after the elastic portion 275 of the ejector gets over the protrusion 212 of the injector. Is shown. As can be seen from FIGS. 18 and 19, when the elastic portion 275 gets over the protrusion 212, the lancet (particularly the lancet body 140) and the plunger (particularly the tip portion 222 thereof) are completely engaged with each other. The holder 170 of the lancet assembly 100 is finally fitted in the lancet assembly receiving member 202, and the loading is substantially completed.

When the ejector has a long shape, for example, it is preferable that an elastic portion 275 is provided at the tip of the long ejector (see FIG. 10). Further, the elastic portion 275 preferably has a branched form extending rearward so as to branch from the ejector body (see FIG. 10). Since the elastic properties can be suitably exhibited by these, the ejector can preferably play a role of giving a "click feeling" when the lancet assembly is loaded.

In the present invention, the ejector 270 also serves as an indicator mechanism indicating that the lancet assembly has been loaded into the injector. Specifically, the ejector 270 has an indicator window portion 276 at the rear end portion thereof, whereby the indicator display portion 227 provided at the rear end portion of the plunger 220 is exposed (FIG. FIG. 10).

More specifically, when the lancet assembly 100 is loaded into the injector 200, the trigger protrusion 220b of the plunger 220 is locked with the rear protrusion 230a of the trigger lever 230 to obtain a cocking state. The indicator display portion 227 of the jar 220 is appropriately exposed from the indicator window portion 276 of the ejector 270 (see FIGS. 5 and 20).

That is, it is possible to indirectly grasp the loading state of the lancet assembly from the exposed state of the indicator display unit 227 of the plunger 220, and by extension, it is possible to grasp whether or not the loading is completed.

Further, in the injector of the present invention, the ejector 270 not only provides "discharging the lancet assembly" and "generating a click feeling when the lancet assembly is loaded", but also has a function related to "recharging".

The mode of "recharge" is shown in FIGS. 24 (A) to 24 (C). FIG. 24 (A) shows the lancet assembly 100 and the injector 200 after puncture. FIG. 24B shows an aspect in which the ejector 270 is moved rearward relative to the injector casing 210 in order to “recharge”, and FIG. 24C shows “recharge”. Shows the aspect at the time of completion.

In the ejector 270, the portion that contributes to recharging is the plunger retracting contact portion 277 (see FIGS. 24 (A) and 24 (B)). As shown in the figure, the plunger retracting contact portion 277 preferably has a stepped shape. More specifically, in the "tip portion 272 of the projecting form of the ejector", the plunger retracting contact portion 277 comes into contact with the rear end of the holder when discharging the "used lancet assembly". It preferably forms a rear end portion (see FIGS. 10 and 24 (A) and 24 (B)).

On the other hand, in the plunger 220, the portion that contributes to recharging is the fuselage cylinder portion 221. That is, it is a fuselage cylinder portion 221 in which a fire spring 220a is installed inside. In particular, it is the front edge portion 221A of the fuselage cylinder portion 221 (see FIGS. 10 and 24A).

When the ejector 270 is moved backward after the puncture, the plunger retracting contact portion 277 of the ejector 270 comes into contact with the plunger 220. More specifically, the plunger retracting contact portion 277 of the ejector abuts on the front edge portion 221A of the fuselage cylinder portion 221 of the plunger (see FIGS. 24 (A) and 24 (B)). Therefore, if the ejector continues to move backward, the plunger 220 will retract due to the pressing force received from the ejector 270, and finally, as shown in FIG. 24C, the plunger 220 The trigger protrusion 220b can be relocked to the rear protrusion 230a of the trigger lever 230 to obtain the cocking state again. That is, the "recharge" is completed, and the puncture-capable state can be obtained again.

《Overall configuration / function of lancet assembly》
25-28 and 2 show the lancet assembly 100. FIG. 25 shows an external view of the lancet assembly 100, and FIG. 26 shows the lancet holder in a half-cut form along its longitudinal direction so that the internal structure of the lancet assembly 100 can be easily understood. FIG. 27 shows a cross-sectional view of the lancet 130 (with the cap removed). Further, FIG. 28 shows a cross-sectional view taken along the line I-I'of FIG. 26. Further, an exploded view / developed view of the assembly is shown in FIG. 2 so that the components of the lancet assembly 100 can be easily understood.

As shown in FIGS. 26 and 2, the lancet assembly 100 has a structure in which the lancet 130 is housed in the holder 170. That is, the lancet assembly 100 of the present invention is substantially composed of two parts, a "lancet 130" and a "holder 170".

Specifically, as shown in FIGS. 26 and 2, the lancet 130 is housed in the holder 170 without the needle tip protection portion 152 of the lancet cap 150 and the lancet body 140 protruding from the holder 170.

Hereinafter, each component of the lancet assembly 100 will be described.

(holder)
The holder 170 of the lancet assembly is, for example, in the form of a cylinder as a whole, as shown in FIGS. 25 and 2. The size of the holder 170 is small, and as shown in FIG. 4, it has a size that can be picked up by a finger as a whole. The shape of the holder 170 is not necessarily limited to the shape of a cylinder, and may be, for example, a square cylinder.

The holder 170 may be formed of any kind of resin material as long as it is a resin material used for a general lancet. The holder 170 has an opening rear end 171 and a puncture opening end 172 at a position facing it (see FIG. 2). The puncture opening end 172 corresponds to a portion applied to a predetermined portion (for example, a fingertip) to be punctured.

As shown in FIGS. 25 and 2, a raised portion 173 is provided on the outer surface of the holder. Preferably, a plurality of raised portions 173 are provided in an annular shape so as to be arranged in the circumferential direction of the holder body portion. The plurality of raised portions 173 engage with the guide raised portion (reference number 202c in FIG. 15) of the lancet assembly receiving member 202 of the injector when the holder is inserted into the injector, whereby smooth insertion is performed. Is realized.

Further, as shown in FIGS. 25 and 2, in the lancet assembly 100 of the present invention, an opening (partially notched opening or the like) is not provided in the body of the holder 170. The inner wall of the holder 170 is provided with a step portion 174 for preventing the forward movement of the body portion of the lancet (particularly see FIG. 26). As shown in the figure, the surface 174A formed by the step portion 174 has a form in which the normal line faces the rear side so as to be substantially parallel to the axis of the holder. Further, a locking portion 175 is also provided on the inner wall of the holder (see particularly FIG. 26). The locking portion 175 is used to prevent the rear movement of the body portion of the lancet before use, and also to prevent the forward movement of the lancet body 140 after use. As shown in the figure, the locking portion 175 preferably has a shape that projects rearward toward the inner center of the injector.

(Lancet)
The lancet 130 is combined with the holder 170. The lancet 130 is also as small as the holder 170 and has a body size that can fit within the holder 170. As shown, the lancet 130 comprises a lancet body 140, a lancet cap 150 and a puncture needle 143. The puncture needle 143 is present in the resin lancet body 140 and the lancet cap 150, particularly as shown in FIGS. 26 and 27, and the tip portion 143a of the puncture needle 143 is provided by the lancet cap 150. It is covered. Therefore, for example, in FIG. 2, the puncture needle 143 does not appear. As shown in FIGS. 26 and 2, the lancet cap 150 and the lancet body 140 are integrally connected via a slight contact. Such a lancet 130 can be manufactured by so-called insert molding, in which a puncture needle is inserted into a mold to mold a resin (eg, polyethylene, polypropylene, etc.), and "slight contacts" (ie, "connecting parts") are , Can be manufactured together with this insert molding. Therefore, the "slight contacts" can be formed from the same resin material as the lancet cap 150 and the lancet body 140.

The lancet cap 150 is connected to the "needle tip protection portion 152 that protects the puncture needle", the "cap head portion 154 that is connected to the needle tip protection portion and is positioned most forward in the lancet cap", and the "cap head portion". , A pair of rear extending portions 156 extending rearward from the cap head portion.

The lancet body 140 is provided in a state of being temporarily held by the holder 170, and the lancet body 140 is provided with an element for that purpose. Specifically, the lancet body 140 includes a pair of flexible protrusions 142 and a pair of bent shape variable positions 144. A pair of flexible protrusions 142 are provided on the front side of the lancet body, whereas a pair of bending shape variable position portions 144 are provided on the rear side of the lancet body. As shown in FIG. 26, the flexible protrusion 142 engages with the locking portion 175 of the inner wall of the holder, and the variable bending shape portion 144 (particularly the bent portion 144A) is the stepped portion 174 of the inner wall of the holder. In particular, the body 140 of the lancet is temporarily held by the holder 170 by engaging with the stepped surface 174A). The former engagement primarily prevents the lancet body from moving backward relative to the holder 170, while the latter engagement primarily prevents the lancet body from moving forward relative to the holder 170. .. At the time of use, when the loading of the lancet assembly into the injector is completed, the bent shape variable position portion 144 is displaced inward due to the balance and contact with the front end portion 222 of the plunger member. Therefore (see FIGS. 18 and 19), the lancet body can be moved forward, and thus can be fired.

In the lancet body 140, the body of the puncture needle 143 is fixed. Therefore, at the time of puncture, the lancet body 140 is integrally fired with the puncture needle 143 and is fired forward. Further, the lancet body 140 has an engaging portion 145 at its rear end for engaging with the mounting portion (reference number 222 in FIG. 10) of the injector plunger 220. That is, when the lancet assembly is loaded into the injector, the rear end 145 of the lancet body can engage the front end 222 of the plunger 220, which causes the plunger to retract as the holder is inserted. The force required to launch the puncture member will be stored in the plunger.

(Removal of lancet cap)
The lancet assembly 100 of the present invention has a pair of rear extending portions 156 extending rearward from the cap head portion 154 (preferably, the pair of rear extending portions 156 have a symmetrical shape). There is). In particular, in the present invention, as shown in FIG. 26, the rear extending portion 156 of the lancet cap extends on the outer surface 170A of the body of the holder 170 along the outer surface 170A in the longitudinal direction of the lancet. This makes it possible to prevent the needle tip from bending or breaking when the cap is removed.

More specifically, when the lancet cap 150 is removed from the lancet 100, the rear extension portion 156 can be rotated so that the rear extension portion 156 of the lancet cap 150 slides on the outer surface 170A of the body of the holder. As a result, bending / breaking of the needle tip 143a of the puncture needle 143 can be suitably prevented. In other words, in the present invention, the rear extension portion 156 is a grip portion (particularly, "a grip portion for the user to grip when removing the lancet cap"), and therefore, the rear extension portion 156 thereof. To remove the lancet cap by rotating the rear extending portion 156 so as to slide the outer surface 170A of the body of the holder. Since the rear extension portion 156 is a grip portion, a ridge portion extending along the width direction of the rear extension portion is preferable (that is, a ridge extending in a direction orthogonal to the axial direction of the lancet). A portion) may be provided on the outer surface of the rear extending portion 156 (for example, the rear extending portion has an outer surface shape as shown in FIGS. 30C and 30D which will be referred to later). You can). More preferably, "a plurality of raised portions extending along the width direction of the rear extending portion" are located closer to the free end 156B of the rear extending portion (a position closer to the free end side than the fixed end side). It may be provided.

Preferably, at least the central portion of the posterior extension of the lancet cap (“the central portion 156'along the width direction of the posterior extension”) is such that it is close and / or in contact with the outer surface of the holder fuselage. It extends longitudinally along the lancet along the outer surface of the holder fuselage. See FIG. 2 for "central portion 156'". More preferably, the inner surface 156A of the rear extending portion 156 of the lancet cap and the outer surface 170A of the body of the holder are in close proximity to or in close contact with each other (see FIG. 26). Specifically, the inner side surface 156A of the rear extending portion 156 and the outer surface 170A of the holder body may be in contact with each other, or 0 mm (not including "0") to 2 mm, preferably 0 mm ("0"). The inner side surface 156A of the rear extending portion 156 and the outer side surface 170A of the holder fuselage are positioned with each other with a slight gap of (not included) to 1 mm, more preferably 0 mm (not including "0") to 0.5 mm. You may be. That is, "close" here means the separation distance between the inner surface 156A of the rear extending portion 156 and the outer surface 170A of the holder fuselage (particularly, the minimum separation distance between the inner surface 156A and the outer surface 170A). ") Is 0 mm (excluding" 0 ") to 2 mm, preferably 0 mm (excluding" 0 ") to 1 mm, and more preferably 0 mm (excluding" 0 ") to 0.5 mm. Refers to an aspect. In one preferred embodiment, at least a portion of the inner surface of the central portion 156'of the posterior extension of the lancet cap is in contact with the outer surface 170A of the holder fuselage. It is also preferable that at least a part of the inner side surface 156A of the rear extending portion 156 of the lancet cap and at least a part of the outer side surface 170A of the body of the holder have complementary forms to each other. For example, at least a portion of the inner surface 156A at the central portion 156'of the posterior extension of the lancet cap (more preferably "all of the inner surfaces 156A at the central portion 156') is the outer surface 170A of the holder fuselage facing it. It is preferable that a part of the above has a complementary morphology.

As shown in FIG. 26, the rearward extending portion 156 of the lancet cap has a large / long rearward extending form. For example, the free end 156B of the rear extension portion 156 of the lancet cap is positioned rearward relative to the position of the needle tip 143a of the puncture needle 143 (or the position of the rear end 152A of the needle tip protection portion 152). The extension portion 156 extends rearward. Preferably, the rear extension 156 extends long until the free end 156B of the rear extension 156 reaches the lancet body 140 (in other words, the free end 156B of the rear extension is above the lancet body 140). The elongated rear extension portion 156 extends rearward from the cap head portion so as to be positioned at). Furthermore, for example, the lancet holder 170 is provided with a constricted portion whose diameter is reduced as a whole, so that the free end 156B of the posterior extending portion is positioned in the constricted portion (that is, the constricted portion). It is preferred that the posterior extension 156 extends (so that the free end 156B is positioned above).

Due to the various characteristic forms as described above, when removing the lancet cap, the user grips only the rear extension portion 156 (that is, the rear extension portion 156 without gripping the cap head portion 154). The rear extending portion 156 can be more preferably slid with respect to the outer surface 170A of the body of the holder, and as a result, the bending / bending of the needle tip 143a can be more preferably prevented.

Further, as shown in FIG. 26, where the rear extending portion 156 of the lancet cap has a long shape, it is preferable that the free end 156B extends rearward so as to extend outward. .. As a result, the rear extending portion 156 can be suitably gripped when the cap is removed, and a smoother "sliding rotation" can be realized.

Although the lancet cap cannot be rotated about the axial direction before loading into the injector, the lancet assembly can be rotated after loading into the injector. This involves a local raised portion 152a in the tip region of the needle tip protection portion 152 (see FIGS. 26 and 2). Specifically, before loading into the injector, the local ridge 152a of the needle tip protection portion 152 of the lancet cap engages with the inner wall surface of the holder (for example, a groove formed in the inner wall) to prevent rotation. Has been done. On the other hand, after the loading into the injector is completed, the lancet cap is slightly moved forward with respect to the holder so that such engagement cannot be performed. Specifically, when the lancet assembly 100 is loaded into the injector 200, the trigger protrusion 220b of the plunger 220 is locked with the rear protrusion 230a of the trigger lever 230 for cocking as shown in FIGS. 19 and 20. Immediately after the state is obtained, the lancet is pushed forward in the form of being pushed by the plunger in the forward urged state. As a result, the lancet moves slightly forward with respect to the holder, that is, the lancet cap moves slightly forward, and the local ridge 152a of the needle tip protection portion 152 of the lancet cap and the inside of the holder The engagement with the wall surface (for example, the groove formed in the inner wall) is released. Therefore, after the loading is finally completed, the lancet cap can be rotated about the axial center.

(Safety function of used lancet assembly)
In the lancet assembly ejected from the injector after puncture, the puncture needle is not exposed to the outside.

Specifically, when ejecting the lancet assembly from the injector after puncture, the ejector is moved forward to press the holder 170 of the lancet assembly 100 forward. As a result, as shown in FIGS. 22 and 23, the holder 170 moves forward relative to the lancet body 140 (that is, from a different point of view, the lancet body 140 moves relative to the holder 170. The flexible protrusion 142 of the lancet body and the locking portion 175 of the inner wall of the holder are engaged with each other. Therefore, due to such engagement, the used lancet body 140 (that is, the lancet body 140 with the puncture needle) cannot move forward in the holder, and the puncture needle is exposed to the outside. Never. Further, as shown in the drawing, since the tip portion 146 of the lancet body can be used in the base region of the locking portion 175, the lancet body 140 cannot be moved backward in the holder 170.

The injector, lancet assembly and puncture device according to the present invention can be embodied in various suitable forms. This will be described below.

(Preferable form with lancet assembly receiving member and lancet holder)
The "plurality of guide ridges 202c of the lancet assembly receiving member 202" and the "plurality of ridges 173 on the outer surface of the lancet holder" may have a longer form. Specifically, as shown on the lower side of FIG. 28, the “guide ridge 202c'' of the lancet assembly receiving member 202” may extend long on the inner surface of the lancet assembly receiving member 202, that is, the lancet assembly. It may extend deeply from the open end of the receiving member 202 toward the bottom. In other words, as shown at the bottom of FIG. 28, the guide groove 202d'' formed by the adjacent guide ridges 202c'' may extend deeper from the open end to the bottom. Similarly, as shown on the lower side of FIG. 28, the raised portion 173'' of the lancet holder may also extend long on the outer surface of the holder. In such a long form, when the holder is inserted into the injector, the “holder ridge 173''” and the “receptive member guide ridge 202c ″” are more preferably engaged with each other. The desired insertion is achieved. In particular, the position of the lancet holder is easily determined immediately before the lancet and the plunger are engaged. As a result, the inconvenience that only the lancet holder rotates and the position is twisted just before the plunger grips the lancet body is prevented.

(Preferable form with needle tip protection part)
The needle tip protection portion 152 of the lancet cap may have a form as shown on the lower side of FIG. 29. Specifically, the needle tip protection portion 152'' that protects the puncture needle may have a hollow portion 152b'' in the vicinity of the tip 143a of the puncture needle. As shown, the needle tip protection portion 152'' may be provided with a hollow portion 152b'' having a form that partially surrounds the periphery of the tip of the puncture needle from the front side. Such a needle tip protection portion 152'' may have a particularly advantageous effect during the manufacture of the lancet. Specifically, at the time of molding the lancet (when the resin raw material is injected into the mold), the resin raw material flows as shown by the dotted arrow in FIG. 29 to fill the mold, and the puncture needle is used. The load on the tip of the plastic will be reduced. That is, the load that the tip of the puncture needle receives from the resin raw material during molding of the lancet is reduced, and inconveniences such as bending of the needle tip are effectively prevented.

(Preferable form with lancet assembly)
The lancet assembly may have a form as shown in FIG. In the lancet assembly 100 shown in each of FIGS. 30A to 30H, when the lancet cap is removed, a rotation peeling operation (an operation of grasping the rear extending portion 156 and rotating the cap about the axial center of the lancet) is performed. It has a form that is actively encouraged by the user. As can be seen from the illustrated embodiment, the "rotational squeezing operation" may be promoted from the viewpoint of the visual effect given to the user, or may be promoted from the viewpoint of the operability of the user. You may.

For example, in the lancet assembly shown in FIG. 30 (A), the lancet cap (particularly, its rear extending portion 156) has two outer curved surfaces 156M, 156N. Specifically, two outer curved surfaces 156M and 156N extend along the longitudinal direction of the rear extending portion. More specifically, the outer curved surface 156M and the outer curved surface 156N are provided adjacent to each other in a form in which their side end portions are common. In the lancet assembly 100 of FIG. 30A, when the rear extending portion 156 of the lancet cap is gripped by a fingertip, it is moved in the “a direction” (that is, the direction in which the cap is pulled out) rather than in the “b direction” (that is, the direction in which the cap is pulled out). , The direction in which the cap is rotated in the axial direction) increases the resistance that the fingertips receive. In other words, from the user's point of view, it is more natural to move the rear extension portion 156 in the "b direction" (the direction in which the cap is rotated about the axial direction), and therefore, the "rotational cutting operation" is positively promoted. Will be done.

31 to 33 show an external perspective view, an external plan view, and an internal structure plan view of the lancet assembly 100 shown in FIG. 30 (A), respectively. Even in the embodiment shown in FIG. 30 (A) (more accurately, even in the lancet assembly having FIGS. 30 (B) to 30 (H) having a lancet cap similar to that of FIG. 30 (A). ), The rear extending portion 156 of the lancet cap has a form that extends largely rearward. In particular, as shown in FIG. 33, the free end / tip 156B of the rear extension portion 156 of the lancet cap is relative to the position of the needle tip 143a of the puncture needle 143 (or the position of the rear end 152A of the needle tip protection portion 152). The rear extension portion 156 extends so as to be positioned rearward. Preferably, the rear extension 156 extends rearward long until the free end 156B of the rear extension 156 reaches the lancet body 140 (in other words, the free end 156B of the rear extension is the lancet body 140. The elongated rear extension portion 156 extends rearward from the cap head portion so as to be positioned upward).

In particular, as shown in FIGS. 31 to 33, in the lancet assembly 100 of FIG. 30 (A), it is preferable that the holder 170 is provided with the circumferential ridge 180. As will be described later, the circumferential ridge 180 may exert an advantageous effect in cooperation with the holder holding members (particularly the sub holding members A and B) when the lancet assembly 100 is loaded into the injector 200.

(Preferable form with holder holding member, lancet assembly receiving member and lancet holder)
The holder holding member is not limited to a single item, and may be composed of a plurality of parts. As shown in FIGS. 34 and 35, the holder holding member 260 has, for example, a two-part configuration including a sub holding member A (260A) and a sub holding member B (260B), and the sub holding member A and the sub The sandwiching member B may be arranged so as to face each other. The sub-holding member A (260A) and the sub-holding member B (260B) are members made of metal such as SUS, respectively.

In the case of the "two-part configuration", it is preferable that each of the sub-holding member A and the sub-holding member B has a locally curved portion. As shown in FIGS. 34 and 35, even in the case of the “two-part configuration”, it is preferable that the locally curved portions (265A, 265B) that are locally curved or bent inward are provided. As shown in the figure, a part of the sub-holding member A (260A) extends forward, and the front extending portion is curved or bent inward. That is, the locally curved portion 265A of the sub-pinching member A (260A) has a form that locally extends forward in the injector and is curved or bent inward. The same applies to the sub-pinching member B (260B), and the locally curved portion 265B of the sub-pinching member B (260B) has a form that locally extends forward in the injector and is curved or bent inward. ing. Further, it is preferable that at least a part of the inner surface of the locally curved portion has a dome shape, that is, as shown in the figure, each of the locally curved portions of the sub-pinching member A (260A) and the sub-pinching member B (260B) ( It is preferable that the inner surface of 265A, 265B) has a dome-shaped portion (265A', 265B'). This means that the holder contact surface of the holder holding member has a substantially hemispherical shape.

When the holder sandwiching member 260 is composed of the sub-pinching member A (260A) and the sub-pinching member B (260B), it is preferable that the lancet assembly receiving member 202 is composed of a plurality of sub-members. As shown in FIG. 34, the lancet assembly receiving member 202 includes "sub-receptive member A (202A) positioned on the front side of the injector" and "sub-receptive member B (202B) positioned on the rear side of the injector". It is preferable to have a two-part configuration composed of. In such a case, it is preferable that the sub-receptive member A (202A) has a ring shape as a whole.

When the sub-holding member A (260A) and the sub-holding member B (260B) have a local curved portion, when the lancet assembly is loaded into the injector, the respective local curved portions (265A, 265B) are the outer surfaces of the holder of the lancet assembly. It is preferable to be in contact with the portion. Further, the sub-holding member A (260A) and the sub-holding member B (260B) are preferably attached to the outer surface of the lancet assembly receiving member, respectively, and are particularly attached to the outer surface of the sub-receiving member B (202B). It is preferable to have. At the front end of the sub-receptive member B (202B), two notches formed by notching a part thereof are provided so as to face each other, and a locally curved portion is positioned with respect to the notches. It is preferable that the sub-holding member A (260A) and the sub-holding member B (260B) are provided so as to be provided. In other words, when viewed from the inside of the lancet assembly receiving member, the local curved portions (265A, 265B) of the sub-pinching member A (260A) and the sub-pinching member B (260B) are notched portions of the lancet assembly receiving member. The holder holding member 260 and the lancet assembly receiving member 202 are combined with each other so as to be exposed from.

As shown in FIG. 34, when the sub-receptive member A (202A _{) is provided with a pair of rearward protrusions (202A 1} , 202A ₂ ) protruding rearward, the pair of rearward protrusions (202A 1, 202A 2) are provided. It is preferable that the 202A ₁ , 202A ₂ ) is positioned so as to cover the sub-holding members A and B (260A, 260B). Specifically, one rear protrusion (202A ₁ ) is positioned so as to cover the sub-holding member A (260A), and the other rear protrusion (202A ₂ ) covers the sub-holding member B (260B). It is preferable that it is positioned at. As a result, the attachment / fixing of the sub-holding member A (260A) and the sub-holding member B (260B) to the sub-reception member B (202B) becomes more reliable, and the holding effect of the holder holding member 260 is more preferably performed. Will be.

The "holder holding member 260" and the "lancet assembly receiving member 202" as shown in FIGS. 34 and 35 have a further advantageous effect when used in combination with the "lancet assembly 100" shown in FIGS. 31 to 33. Is played. In particular, when the lancet assembly is loaded into the injector, a further advantageous effect is produced. This will be described in detail with reference to FIGS. 36 and 37.

FIG. 36 shows a state in which the lancet assembly 100 has been loaded into the injector. As can be seen from the illustrated aspect, in the fully loaded puncture device, the peripheral ridge 180 of the holder is positioned behind the dome-shaped portion (265A', 265B') of the holder holding member. This means that when the loading is completed, the peripheral ridge portion 180 of the holder once contacts the dome-shaped portion (265A', 265B'), and then overcomes the dome-shaped portion (265A', 265B'). (See also FIGS. 37A and 37B). In this way, when the circumferential ridge 180 of the holder gets over the dome-shaped portion (265A', 265B') of the holder holding member, a suitable click feeling is provided to the user. That is, from the user's point of view. The "click feeling" makes it possible to reliably grasp the completion of loading of the lancet assembly.

(A preferred form related to needle exposure prevention)
“A preferred embodiment related to needle exposure prevention” will be described with reference to FIGS. 38 to 45. In particular, "a suitable lancet assembly form related to prevention of needle exposure due to half-missing lancet" will be described. The lancet assembly having such a form prevents the lancet from falling out of the holder even if the lancet is unintentionally or accidentally urged forward, and is also unwilling when the lancet cap is removed. Or even if the lancet is accidentally urged forward, the needle tip will not pop out of the holder.

In the lancet assembly 100 having such a form, the lancet body 140 is provided with a bent shape variable position portion 144, and the holder 170 is provided with a locked portion 190A for locking the bent shape variable position portion. The bent portion 144A of the position portion 144 is positioned so as to be able to be locked to the locked portion 190A of the holder (see FIG. 39). As shown in FIGS. 38 and 39, the locked portion 190A may have an opening form, and the bent portion 144A of the bent shape variable position portion 144 is locked to the holder wall portion that defines such an opening. You can do it.

When the lancet is unintentionally or accidentally urged forward with respect to the lancet assembly 100 in the state shown in FIG. 39, the bent portion 144A (particularly the outer surface portion thereof) of the bent shape variable position portion is shown in FIG. Will be locked to the locked portion 190A of the holder, and as a result, the lancet will not fall out of the holder.

FIG. 41 shows a state in which the lancet assembly 100 has been loaded into the injector 200. That is, in the embodiment shown in FIG. 41, the lancet body 140 and the plunger (particularly, the tubular mounting portion 222 at the tip thereof) are engaged with each other to complete the loading of the lancet assembly 100 into the injector 200. When the lancet is unintentionally or accidentally urged forward with respect to the lancet assembly 100 in the state shown in FIG. 41 (for example, when a force for pulling the lancet forward is applied when the lancet cap is removed), FIG. As shown in 42, the bent portion 144A (particularly the outer surface portion thereof) of the bent shape variable position portion 144 is locked to the “further locked portion 190B” of the holder so that the lancet does not fall out of the holder. It has become. The "further locked portion 190B" may also have an opening form similar to the locked portion 190A, and therefore the bending shape variable position portion 144 is bent in the holder wall portion that defines such an opening. The portion 144A can be locked. That is, even if the lancet is unintentionally or accidentally urged forward when the lancet cap is removed, the needle tip does not pop out from the holder (see also FIGS. 43 to 45). ).

(Another suitable form related to needle exposure prevention)
Next, "another suitable form related to needle exposure prevention" will be described with reference to FIG. In particular, an injector suitably configured for such prevention will be described. In such injectors, the injector may be unwillingly or accidentally loaded after the lancet assembly has been loaded and before the lancet cap has been removed (hereinafter also referred to as the "post-loading and pre-cap removal stage"). Even if the trigger lever is operated, safety is suitably guaranteed.

Specifically, the trigger lever of the injector is pushed (that is, the trigger lever is pushed from the outside toward the inside of the injector) at the stage before the cap is removed after the loading is completed, and then the lancet assembly is pushed from the injector. Even if it is pulled out, there is no risk of needle exposure in the lancet assembly. More specifically, in the lancet assembly pulled out in this way, even if the lancet cap is removed, the needle tip of the puncture member is not exposed to the outside.

A portion that contributes to such a safety-guaranteed puncture device is a protrusion provided on the trigger lever 230 (a trigger member that causes the lancet to be fired by the lancet assembly loaded in the injector). Specifically, it is a protrusion shown by reference numeral 230c in FIG. The trigger lever is provided with a rear protrusion 230a for temporarily blocking the movement of the lancet assembly loaded on the injector to the front side, and the trigger lever is provided with a rear protrusion 230a at a position on the front side of the rear protrusion 230a. A protrusion 230c ”is provided. As can be seen from the illustrated form, it is preferable that the "further protrusion 230c" is provided side by side with the rear protrusion 230a and adjacent to the rear protrusion 230a.

In this embodiment, the trigger lever is operated after the lancet and the plunger are engaged with each other and the lancet assembly is completely loaded into the injector, and the lancet assembly is operated before the lancet cap is removed. Even when pulled out of the injector, the advance of the plunger connected to the lancet is blocked by the "further protrusion 230c" of the trigger lever, resulting in the above safety.

A specific description with reference to FIG. 46 will be as follows. The lancet (particularly the lancet body 140) and the plunger (particularly the tubular mounting portion 222 at its tip) are engaged with each other and the lancet assembly is fully loaded in the injector, that is, "cap removal after loading". In the "previous stage", the trigger lever 230 is originally operated after the lancet cap 150 is removed. However, it is not uncommon for the trigger lever 230 to be operated prior to the removal of the lancet cap 150, either unintentionally or accidentally. If the trigger lever is operated prior to removing the lancet cap, the puncture device will be in the state shown in FIG. 46 (a). Specifically, when the tip 230b of the trigger lever is pushed toward the inside of the injector to operate the trigger lever (see FIG. 7), the rear protrusion 230a of the trigger lever 230 and the protrusion 220b of the plunger 220 The cocking state with is released. Therefore, the plunger 220 is positioned more forward due to the release of the compressed state of the fire spring, and the puncture device takes the form shown in FIG. 46 (a). When the lancet assembly 100 is pulled out from such a state, more specifically, when the lancet assembly 100 is pulled out from the injector 200, the plunger 220 engaged with the lancet 130 moves forward. .. Although the plunger 220 moves forward, the trigger protrusion 220b provided on the plunger 220 is locked to the "further protrusion 230c", so that the movement itself is immediately blocked (FIG. 46 (b)). reference).

Subsequently, when the withdrawal of the lancet assembly is continued, the engagement between the lancet and the plunger is finally released. At that time, as shown in FIG. 46 (c), in the lancet assembly 100. The bent portion 144A (particularly the outer surface portion thereof) of the bent shape variable position portion 144 is locked to the “further locked portion 190B” of the holder. Specifically, at the time of such disengagement, the bending shape variable position portion 144 of the lancet partially housed in the tubular mounting portion 222 of the plunger is released from the tubular mounting portion 222, so that the bending is performed. The shape variable position portion 144 returns to the original form. As a result, the bent portion 144A of the bent shape variable position portion 144 can be locked to the “further locked portion 190B” of the holder. In such a locked state, the position of the needle tip of the lancet is positioned at the same position as the tip of the lancet holder 170 or behind it. Therefore, in the lancet assembly 100 finally removed from the injector, the needle tip (that is, the needle tip 143a of the puncture needle) is not exposed from the holder 170 even if the cap 150 is removed (FIG. 46 (d) and FIG. (See FIG. 46 (e)).

It should be added to confirm that the present invention described above has the following aspects.
The first aspect : An injector for firing a lancet of a lancet assembly to be used for puncturing, comprising a plunger for firing the lancet in the puncturing direction and an injector casing containing the plunger.
The puncture depth adjustment mechanism of the injector
A protrusion that protrudes outward from the plunger in its transverse direction,
It is composed of a cylindrical member having an uneven portion and a step portion, and a spring member provided side by side with the cylindrical member along the axial direction of the injector.
While the concave-convex portion is provided on the cylindrical member so that the normal of the surface forming the concave-convex portion is substantially parallel to the axial direction of the injector, the complementary shape portion having a shape complementary to a part of the uneven portion is the injector. It is provided on the casing, and the contact between a part of the uneven portion of the cylindrical member and the complementary shape portion of the injector casing is maintained by the pressing force applied from the spring member.
When the plunger moves forward during puncture, the protrusion of the plunger collides with the step portion of the cylindrical member so that the plunger cannot move further forward and the puncture depth. By rotating the cylindrical member about its axis, the step portion where the protrusion of the plunger will collide can be changed to a step portion of a different height, whereby the front of the plunger can be adjusted. An injector that changes the distance traveled.
Second aspect : In the first aspect, the uneven portion of the cylindrical member has a form that is periodically continuous along the circumferential direction of the cylindrical member.
An injector characterized in that when the cylindrical member is rotated to adjust the puncture depth, a part of the uneven portion of the cylindrical member that abuts on the complementary shape portion of the injector casing changes to another part.
Third aspect : In the second aspect, when a part of the uneven portion of the cylindrical member that abuts on the complementary shape portion of the injector casing changes to another part, the spring member temporarily contracts. Injector.
Fourth aspect : An injector according to any one of the first to third aspects, wherein the spring member is a coil spring.
Fifth aspect : In any one of the first to fourth aspects, the cylindrical member is provided with a scale value along the circumferential direction, while the injector casing is used to expose the scale value of the cylindrical member. There is an opening window for the scale,
The scale numerical values of the cylindrical member are composed of a first numerical value string and a second numerical value string that are adjacent to each other, and a scale opening window is provided on the opposite side surface of the injector casing. An injector composed of an opening window, wherein the numbers in the first numerical column are exposed from the first opening window, while the numbers in the second numerical column are exposed from the second opening window.
Sixth aspect : In any of the first to fifth aspects, the uneven portion is provided in the end region of the outer peripheral surface of the cylindrical member, and the complementary shape portion is provided on the inner wall surface of the injector casing. An injector characterized by that.
Seventh aspect : In any of the first to sixth aspects, the plunger is provided so that the step portion is provided on the inner peripheral surface of the cylindrical member and the protruding portion of the plunger is positioned inside the cylindrical member. An injector characterized by penetrating a cylindrical member.
Eighth aspect : An injector for firing a lancet of a lancet assembly for puncturing, comprising a plunger for firing the lancet in the puncturing direction and an injector casing containing the plunger.
Injector lancet assembly holding mechanism,
It consists of a lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly, and a metal holder holding member attached to the lancet assembly receiving member.
When the lancet assembly is loaded onto the injector so that the lancet assembly holder fits in the lancet assembly receiving member, the holder holding member holds the holder.
Ninth aspect : The injector according to the eighth aspect, wherein the holder of the lancet assembly is sandwiched by the holder holding member by the elastic force exhibited by the holder holding member.
Tenth aspect : The injector according to the eighth or ninth aspect, wherein the entire form of the holder holding member has a ring form with a partial notch.
Eleventh aspect : In any one of the eighth to tenth aspects, the holder sandwiching member has a two-part configuration including a sub-pinching member A and a sub-pinching member B, and the sub-pinching member A and the sub-pinching member A and the sub-pinching member B. An injector characterized in that the member B is arranged so as to face each other.
Twelveth aspect : In any one of the eighth to eleventh aspects, the holder holding member has a locally curved portion (locally bent portion) in which a part thereof is curved or bent inward.
When loading the lancet assembly into the injector, the injector is characterized in that the locally curved portion is in contact with the outer surface portion of the holder of the lancet assembly (such as the outer peripheral surface of the holder and the circumferential ridge provided therein).
Thirteenth aspect : In the twelfth aspect, the holder holding member is attached so as to be in close contact with the outer peripheral surface of the lancet assembly receiving member.
An injector characterized in that a locally curved portion of a holder holding member is exposed from a notch portion of the lancet assembly receiving member on the inner peripheral surface of the lancet assembly receiving member.
Fourteenth aspect : An injector according to any one of the eighth to thirteenth aspects, wherein at least a part of the inner surface of the locally curved portion has a dome shape (dome-shaped portion).
Fifteenth aspect : In any of the twelfth to fourteenth aspects subordinate to the eleventh aspect, the lancet assembly receiving member is positioned on the sub-receptive member A positioned on the front side of the injector and on the rear side of the injector. An injector having a two-part configuration including the sub-receptive member B, wherein the sub-receptive member A has a ring shape as a whole.
16th aspect : In the 15th aspect, the sub-receptive member A is provided with a pair of rearward projecting portions projecting rearward, and the pair of rearward projecting portions are placed on the sub-pinching member A and the sub-pinching member B. An injector characterized by being positioned so as to cover it.
Seventeenth aspect : An injector that fires a lancet of a lancet assembly and provides it for puncture.
It consists of a plunger that fires the lancet in the puncture direction, an injector casing that contains the plunger, and an ejector for ejecting the lancet assembly loaded in the injector.
While the ejector is provided with an elastic portion, a protrusion is provided on the inner wall surface of the injector casing, and when the lancet assembly is loaded into the injector to engage the lancet and the plunger with each other, the elastic portion of the injector is provided. Is an injector that once contacts the protrusion of the injector and then overcomes the protrusion.
Eighteenth aspect : In the seventeenth aspect, the injector is characterized in that the lancet and the plunger are completely engaged when the elastic portion of the ejector gets over the protrusion of the injector.
19th aspect : The injector according to the 17th aspect or the 18th aspect, wherein the ejector has a long shape, and an elastic portion is provided at a tip end portion of the long shape ejector.
20th aspect : In any of the 17th to 20th aspects, the elastic portion has a branched form extending rearward so as to branch from the ejector body.
21st aspect : An injector that fires a lancet of a lancet assembly and provides it for puncture.
It consists of a plunger that fires the lancet in the puncture direction, an injector casing that contains the plunger, and an ejector for ejecting the lancet assembly loaded in the injector.
The ejector is provided with a contact part for retracting the plunger.
When the ejector is moved backward after puncture, the plunger retracting contact portion of the ejector comes into contact with the plunger, whereby the plunger retracts due to the pressing force received from the ejector.
22nd aspect : A lancet assembly composed of a lancet and a holder for storing the lancet.
The lancet consists of a lancet body, a lancet cap and a puncture needle, in which a metal puncture needle resides across the resin lancet body and lancet cap, and the lancet cap causes the puncture needle tip to be Covered and
The lancet cap,
Needle tip protection that protects the puncture needle,
It has a cap head part that is connected to the needle tip protection part and is positioned most forward by the lancet cap, and a pair of rear extending parts that are connected to the cap head part and extend rearward from the cap head part. Made up of
A lancet assembly in which the posterior extension of the lancet cap extends along the outer surface of the holder's fuselage.
23rd aspect : In the 22nd aspect, the free end of the posterior extending portion of the lancet cap is larger than the position of the needle tip of the puncture needle or the installation position of the needle tip protection portion (particularly, the "rear end of the needle tip protection portion"). A lancet assembly characterized in that the posterior extension extends posteriorly so that it is positioned posteriorly.
24th aspect : In the 22nd or 23rd aspect, the lancet assembly is characterized in that the inner surface of the rear extending portion of the lancet cap and the outer surface of the body of the holder are close to each other or in close contact with each other.
25th aspect : In any of the 22nd to 24th aspects, at least a part of the inner surface of the rear extending portion of the lancet cap and at least a part of the outer surface of the body of the holder are complementary to each other. A lancet assembly characterized by having.
26th aspect : In any of the 22nd to 25th aspects, when the lancet cap is removed from the lancet, the rear extending portion of the lancet cap slides on the outer surface of the body of the holder. (That is, when the lancet cap is removed, the rear extension portion gripped by the user slides and rotates on the outer surface of the body of the holder).
27th aspect : In any of the 22nd to 26th aspects, the lancet body is provided with a bent shape variable position portion, while the holder is provided with a locked portion for locking the bent shape variable position portion. And
A lancet assembly characterized in that the bent portion of the bent shape variable position portion (that is, the bent portion located in the intermediate portion of the bent shape variable position portion) is positioned in a lockable state with the locked portion of the holder. ..
28th aspect : A puncture device composed of an injector according to any one of the first to 21st aspects and a lancet assembly according to any of the 22nd to 27th aspects.
29th aspect : In the 28th aspect, which is subordinate to the 14th aspect,
A circumferential ridge is provided on the outer peripheral surface of the holder of the lancet assembly.
When loading the lancet assembly into the injector, the puncture device is characterized in that the circumferential ridge portion of the holder once contacts the dome-shaped portion of the holder holding member and then overcomes the dome-shaped portion.
30th aspect : In the 28th aspect or the 29th aspect, which is subordinate to the 27th aspect, the holder is provided with an additional locked portion for locking the bending shape variable position portion.
When only the lancet is moved forward after the lancet and the plunger are engaged with each other and the lancet assembly is loaded on the injector, the bent portion of the bent shape variable position portion of the lancet body (that is, the bent shape variable position portion). A puncture device characterized in that a bent portion) located in the middle portion of the holder is locked to a further locked portion of the holder.
31st aspect : In any of the 28th to 30th aspects subordinate to the 8th aspect,
The injector further comprises a trigger lever that triggers the firing of the lancet in the lancet assembly loaded on the injector.
The trigger lever is provided with a rear protrusion for temporarily preventing the lancet assembly loaded on the injector from moving to the front side, and a further additional protrusion is provided at a position on the front side of the rear protrusion. A puncture device characterized by having a portion.
32nd aspect : In the 31st aspect, after the lancet assembly is loaded into the injector by engaging the lancet and the plunger with each other, the trigger member is operated and the lancet is operated before the lancet cap is removed. A puncture device characterized in that when the assembly is pulled out of the injector, the advance of the plunger connected to the lancet assembly is blocked by the additional protrusion of the trigger lever.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto. Those skilled in the art will easily understand that not only various forms are conceivable in the present invention, but also various modifications can be made. For example, the puncture needle 143 has a needle-like pointed shape at the tip as shown in the figure, but is not necessarily limited to such a shape. For example, the puncture needle 143 may have a "blade" shape in which one side surface of the tip portion is sharpened.

Cross-reference of related applications

This application claims priority under the Paris Convention based on Japanese Patent Application No. 2015-31017 (Filing date: February 19, 2015, title of invention: "injector, lancet assembly and puncture device"). All content disclosed in this application shall be incorporated herein by this reference.

100 Lancet assembly 130 Lancet assembly lancet 140 Lancet body 142 Flexible protrusion of lancet body 143 Puncture needle 143a Needle tip (needle tip part) of puncture needle
144 Bending shape variable position part of lancet body 144A Bending part of bending shape variable position 145 Rear end part of lancet body 146 Front end part of lancet body 150 lancet cap 152 Needle tip protection part of lancet cap 152A Needle tip protection part of lancet cap Rear end 152'' Needle tip protection part of lancet cap (suitable modified form example)
152a Local raised portion provided in the needle tip protection portion 152b'' Hollow portion provided in the needle tip protection portion (suitable modified form example)
154 Lancet cap cap head 156 Lancet cap rear extension 156M, 156N Outer curved surface of rear extension 156A Inner surface of rear extension 156B Free end of rear extension 170 Lancet assembly holder 170A Holder fuselage Outer surface 171 Rear end of holder opening 172 Holder puncture opening end 173 Raised portion provided on the outer surface of the holder 173'' Raised portion provided on the outer surface of the holder (Preferable modified form example)
174 Stepped portion provided on the inner wall of the holder 174A Surface formed by the stepped portion 175 Locking portion provided on the inner wall of the holder 180 Circumferential ridge portion of the holder 190A Holder locked for locking the bending shape variable position portion Part 190B Further holder for locking the bent shape variable position Locked part 200 Injector 201 Injector front end opening 202 Lancet assembly receiving member of lancet assembly holding mechanism 202A Sub-receptive member A
202A ₁ , 202A ₂ Pair of posterior protrusions of sub-receptive member A 202B Sub-receptive member B
202a Circumferential groove provided on the outer surface of the fuselage of the lancet assembly receiving member 202b Notch opening provided on the fuselage of the lancet assembly receiving member 202c Guide ridge of the lancet assembly receiving member 202c'' Guide ridge of the lancet assembly receiving member (Example of suitable modified form)
202d Guide groove of lancet assembly receiving member 202d'' Guide groove of lancet assembly receiving member (Preferable modification example)
210 Injector casing 212 Projection provided on the inner wall surface of the injector casing 215 Complementary shape portion provided on the inner wall surface of the injector casing 216 Opening window for graduation provided on the injector casing 216a First opening for graduation Window 216b Second opening window for scale 220 Plunger 220a Plunger fire spring 220b Plunger trigger protrusion 220c Plunger return spring 221 Plunger casing casing 221A Plunger casing front side Edge 222 Plunger tip (cylindrical mounting part to which the lancet is mounted)
225 Plunger depth adjustment protrusion 227 Indicator display provided at the rear end of the plunger 230 Trigger lever (trigger member)
230a Rear protrusion of trigger lever 230b Front end of trigger lever 230c Further protrusion of trigger lever (protrusion for preventing needle tip exposure)
240 Cylindrical member of puncture depth adjustment mechanism 242 Concavo-convex portion provided on the cylindrical member of the puncture depth adjustment mechanism 242a, 242b, 242c ... Surface forming the concavo-convex portion 246 Provided on the cylindrical member of the puncture depth adjustment mechanism. Steps 246a, 246b, 246c ... Steps with different heights 248 Scale value provided on the cylindrical member of the puncture depth adjustment mechanism 248a Scale value 1st value sequence 248b Scale value 2nd value sequence 250 Puncture depth Spring member of adjustment mechanism 260 Lancet assembly Holding mechanism holder puncture member 260A Sub puncture member A
260B Sub-holding member B
265 (265a, 265b) Local bending part of the holder holding member 265'Dome shape part of the local bending part 265A Local bending part of the sub holding member A 265A' Dome provided on the local bending part (inner surface) of the sub holding member A Shape part 265B Local bending part of sub-holding member B 265B'Dome shape part provided on the local bending part (inner side surface) of sub-holding member B 270 Ejector 272 Tip of ejector 275 Elastic part provided on ejector 276 Ejector Indicator window provided 277 Ejector plunger retracting contact 1000 Puncture device

100'Lancet assembly 101'Lancet 102' Protective cover 104'Lancet body 105'Puncture member 106'Lancet cap 108' Weakening member 200'Injector 204' Plunger 214' Injector front end opening 264', 266' Plunger tip Part 514'Trigger member 542'Press part of trigger member

Claims (7)

It is an injector that fires the lancet of the lancet assembly and uses it for puncture, and has a plunger that fires the lancet in the puncture direction and an injector casing that contains the plunger.
Injector lancet assembly holding mechanism,
It consists of a lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly, and a metal holder holding member attached to the lancet assembly receiving member.
When the lancet assembly is loaded onto the injector so that the lancet assembly holder fits in the lancet assembly receiving member, the holder holding member holds the holder .
The holder holding member has a locally curved portion that is partially curved or bent inward, and when the lancet assembly is loaded into the injector, the locally curved portion is formed on the outer surface portion of the holder of the lancet assembly. contact,
An injector in which a holder holding member is attached to the outer surface of the lancet assembly receiving member, and a locally curved portion of the holder holding member is exposed from a notch of the lancet assembly receiving member on the inner surface of the lancet assembly receiving member. It is an injector that fires the lancet of the lancet assembly and uses it for puncture, and has a plunger that fires the lancet in the puncture direction and an injector casing that contains the plunger.
Injector lancet assembly holding mechanism,
It consists of a lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly, and a metal holder holding member attached to the lancet assembly receiving member.
When the lancet assembly is loaded onto the injector so that the lancet assembly holder fits in the lancet assembly receiving member, the holder holding member holds the holder .
The holder holding member has a locally curved portion that is partially curved or bent inward, and when the lancet assembly is loaded into the injector, the locally curved portion is formed on the outer surface portion of the holder of the lancet assembly. contact,
An injector in which the inner surface of the locally curved portion has a dome-shaped portion. The injector according to claim 1 or 2 , wherein the holder of the lancet assembly is sandwiched between the holder holding members by the elastic force of the holder holding member. The lancet assembly receiving member has a two-part configuration consisting of a sub-receptive member A located on the front side of the injector and a sub-receptive member B located on the rear side of the injector, and the sub-receptive member A as a whole has a two-part structure. The injector according to any one of claims 1 to 3, wherein the injector has a ring shape. It is an injector that fires the lancet of the lancet assembly and uses it for puncture, and has a plunger that fires the lancet in the puncture direction and an injector casing that contains the plunger.
Injector lancet assembly holding mechanism,
It consists of a lancet assembly receiving member provided in the front end opening of the injector and capable of accommodating the holder of the lancet assembly, and a metal holder holding member attached to the lancet assembly receiving member.
When the lancet assembly is loaded onto the injector so that the lancet assembly holder fits in the lancet assembly receiving member, the holder holding member holds the holder .
The lancet assembly receiving member has a two-part configuration consisting of a sub-receptive member A located on the front side of the injector and a sub-receptive member B located on the rear side of the injector, and the sub-receptive member A as a whole has a two-part structure. Has a ring form as
The holder holding member has a two-part configuration composed of a sub holding member A and a sub holding member B, the sub holding member A and the sub holding member B are arranged to face each other, and the sub receiving member A is rearward. An injector in which a pair of rearward protrusions projecting to the side are provided, and a pair of rearward protrusions are positioned on the sub-holding member A and the sub-holding member B. The injector according to claim 5 , wherein the holder of the lancet assembly is sandwiched between the holder holding members by the elastic force of the holder holding member. The holder holding member has a locally curved portion that is partially curved or bent inward.
The injector according to claim 5 or 6 , wherein the locally curved portion contacts the outer surface portion of the holder of the lancet assembly when the lancet assembly is loaded into the injector.

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